JSKN016: JSKN016 is administered via intravenous infusion at doses of 5mg/kg or 6mg/kg every 3 weeks, starting on Day 1 of each cycle. If the 5mg/kg dose is well tolerated during the safety lead-in phase, the dose may be increased to 6mg/kg for subsequent cycles.
Capecitabine: The drug is administered orally at a dose of 1000mg/m², twice daily for two weeks, followed by a one-week break. Treatment cycles repeat every three weeks.
Paclitaxel (albumin bound): The drug is administered intravenously at a dose of 125mg/m², with infusions on Day 1 and Day 8 of each treatment cycle. The treatment cycle is repeated every 3 weeks.
Eribulin: The drug is administered intravenously at a dose of 1.4mg/m², with infusions on Day 1 and Day 8 of each treatment cycle. The treatment cycle is repeated every 3 weeks.
Pembrolizumab: The drug is administered intravenously at a fixed dose of 200mg, with infusions on Day 1 of each 3-week treatment cycle.
Study summary
This study aims to evaluate the safety and effectiveness of JSKN016 in combination with different treatments for patients with HER2-negative breast cancer that cannot be removed by surgery or has spread to other parts of the body. The study includes four groups of patients based on treatment history and tumor characteristics. Each group will receive JSKN016 with chemotherapy or immunotherapy. The goal is to find out how well the treatment works and how safe it is.
Eligibility
Sex
ALL
Min age
18 Years
Max age
75 Years
Healthy volunteers
No
Inclusion Criteria:
1. Capable of understanding and signing the informed consent form.
2. Aged ≥18 and ≤75 years, regardless of sex.
3. Histologically or cytologically confirmed inoperable locally advanced or metastatic HER2-negative breast cancer.
4. Hormone receptor-positive participants with progression/intolerance after standard endocrine therapy, or unsuitable for it.
5. Disease progression confirmed by radiological evidence post-systemic treatment.
6. Available archived or newly obtained tumor tissue/biopsy.
7. No prior systemic therapy for advanced disease, except for prior endocrine ± targeted therapy or CDK4/6 inhibitors.
8. Measurable non-CNS lesion per RECIST 1.1.
9. Expected survival ≥3 months.
10. ECOG performance status of 0 or 1.
11. Contraceptive use agreement for fertile participants.
12. Adequate organ function within 7 days of enrollment:
* Bone marrow: ANC ≥1.5 × 10⁹/L, Hemoglobin ≥90 g/L, Platelets ≥100 × 10⁹/L.
* Liver: Bilirubin ≤1.5 × ULN, ALT/AST ≤3 × ULN.
* Renal: Creatinine ≤1.5 × ULN or Ccr ≥60 mL/min.
* Coagulation: INR/PT ≤1.5 × ULN, APTT ≤1.5 × ULN.
13. LVEF ≥50%.
Exclusion Criteria:
1. CNS metastasis (except stable cases treated with radiation or surgery).
2. Unstable spinal cord compression or untreated history.
3. Recent live vaccine (except seasonal flu vaccines).
4. Recent anti-tumor treatment within 28 days or 5 half-lives (whichever is shorter).
5. Recent palliative therapy within 14 days.
6. Major surgery within 28 days or planned during the study.
7. Severe gastrointestinal issues or recent major GI bleeding.
8. Uncontrolled pleural/peritoneal effusions or cachexia.
9. Prior HER3/TROP2-targeted therapy or topoisomerase I inhibitors.
10. Other malignancies within 5 years (except certain skin or localized cancers).
11. Current interstitial lung disease or uncontrolled infections.
12. Severe hypercalcemia or uncontrolled cancer-related pain.
13. Autoimmune diseases, unless stable with treatment.
14. Uncontrolled comorbidities (e.g., active infections, cardiovascular issues).
15. Toxicities from previous treatments not resolved to CTCAE ≤1.
16. Recent steroid use or need for systemic immunosuppressive therapy.
17. Allergy to study drug components.
18. Pregnancy or breastfeeding.
Primary outcome measure(s)
Objetctive Response Rate (ORR) — From baseline until disease progression, death, or end of treatment, whichever occurs first (up to approximately 24 months) The proportion of participants who achieve a confirmed complete response (CR) or partial response (PR), as assessed by investigators according to RECIST v1.1 criteria.
This page summarises publicly available registry data for informational purposes — not medical advice. Eligibility is determined by each study team; patients should discuss participation with their clinician.
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